Hostname: page-component-77c89778f8-7drxs Total loading time: 0 Render date: 2024-07-18T10:24:28.619Z Has data issue: false hasContentIssue false

Physical Properties of the Extranuclear Emitting Regions in Irregular and Interacting AGNs

Published online by Cambridge University Press:  07 August 2017

P. Rafanelli*
Affiliation:
Department of Astronomy, University of Padova, Padova, Italy

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

CCD slit spectra have been obtained at Lick Observatory of a sample of fourteen close interacting and irregular Seyfert galaxies. The spectra of the extranuclear emitting regions have been investigated and classified using the quantitative criteria recommended by Veilleux and Osterbrock to distinguish objects photoionized by thermal sources from objects photoionized by a “power law” continuum. From our data it results that four out of the twenty emitting regions identified are typical H II regions, while eight have spectra photoionized by a hard-photon spectrum. Seven regions show a twofold behavior which is interpreted in terms of a combination of photoionization, shock heating and scattering of light by dust.

Type
Part 8: Relationships of Nucleus, Galaxy and Environment
Copyright
Copyright © Kluwer 1989 

References

Shull, J.M. and McKee, C.F. 1979, Ap. J., 227, 131 Google Scholar
Veilleux, S., and Osterbrock, D.E. 1987, Ap. J. Suppl., 63, 295 CrossRefGoogle Scholar